Binder for priming compounds



Patented June 25, 1929.

UNITED STATES PATENT OFFICE.

LAWRENCE w. JORDAN, OF NEW HAVEN, CONNECTICUT, ASSIGNOR, BY MESNE AS- SIGNHENTS, TO WINCHESTER REPEATING ARMS COMPANY, OF NEW HAVEN, CON- NECTICUT, A CORPORATION OF DELAWARE.

BINDER FOR PRIHING COMPOUNDS.

No Drawing.

This invention relates to hinder solutions particularly adapted for use in the manufacture of priming compounds to be employed with explosives.

An object of the invention is a provision of a binder possessing the necessary binding qualities to bind the ingredients of a priming compound which, at the same time, is largely devoid of the tackiness of binders heretofore used, thus obviating many of the difiiculties encountered in the preparations of priming compounds.

My improved binder solution is characterized by the use of casein and a salt or salts of alkali metals, or by the use of a metallicv .caseinate as one of the ingredients thereof. In a typical embodiment of the invention I preferably employ three preliminary solutions to produce the final binder solution which is used in the manufacture of the priming compound. These three solutions are composed approximately as follows:

Solution A.

v 3231i? Casein 100 Sodium tetraborate 15 Water 600 Solution B. Parts by weight. Gum tragacanth 15 Water 400 Solution 0.

Parts by weight. Th mol 1 Et yl alcohol 5 The three solutions are separately prepared and solutions A and B are allowed to stand over night at room temperature. Solution A is carefully heated and stirred during the heating operation until it is smooth and mucilaginous. Solution B is then added to it and the resulting mixture cooked gently with occasional stirring from one or two .hours. The mixture is then removed from the heater and stirred for about one-half hour. ture andthoroughly mixed in. The mixture is then strained, preferably through a double layer of cheese-cloth to remove the solids and is ready for use.

As stated the binder solution thus prepared possesses characteristics which make it supe- Solution C is then added to the mix Application filed February 'I, 1988. Serial 1T0. 252,679.

rior to hinder solutions heretofore employed for this purpose. Its ability to properly bind the ingredients of most priming compounds is entirely satisfactory and, at the same time. it is largely devoid of the tackiness of mixtures heretofore employed.

The binder solution is used in the same manner, and in substantially the same proportions as similar solutions heretofore employed. In preparing the priming compound the oxidizing agent and fuel are first mixed dry in proper proportions and the reqlisite amount of the binder solution added thereto and mixed in. The fulminate of mercury, or other detonator is then weighed out and added to the mixture. While I have disclosed certain proportions in the foregoing description. and a definite method of producing sodium caseinate in the mixture, my invention is not limited either to the proportions of ingredients nor to the precise ingredient-s stated. Broadly the invention comprises a binder solution having casein, or a casein derivative present in the final product. It will be apparent to those skilled in the art that the proportion stated mav be varied within a considerable range and that gums other than gum tragacanth and salts other than sodium tetraborate may be used without departing from the spirit of the invention.

I claim 1. A binder for priming mixtures having a metallic cascinate as an ingredient.

2. A binder for priming mixtures consisting essentially of a metallic caseinate and a. gum.

' 3. A. binder for priming-mixtures consisting essentially of caseinate. a gum, thymol and alcohol.

4. The method of making a binder solution suitable for use in priming mixtures for explosives consisting essentially of preparing a solution of casein and borax, heating the solution. adding a solution of a gum thereto and heating the mixture.

5. The method of making a. binder solu- LAWRENCE W. JORDAN.

CERTIFICATE OF CORRECTION.

Patent No. 1,718, 358. Granted June 25, 1929, to

LAWRENCE W. JORDAN.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Lines 67 and 68, for the misspelled word "reqlisite" read "requisite", and line 93, claim 3, before the word "caseinate" insert the words "a metallic"; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of, the case in the Patent Office.

Signed and sealed this 30th day of July, A. D. 1929.

I M. J. Moore, (Seal) Acting Commissioner of Patents.

CERTIFICATE OF CORRECTION.

Patent No. 1,718,358. Granted June 25, 1929, to

LAWRENCE w. JORDAN It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Lines 67 and 68, for the misspelled word "reqlisite" read "requisite", and line 93, claim 3, before the word "easeinate" insert the Words "a metallic"; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 30th day of July, A. D. 1929.

M. J. Moore, (Seal) Acting Commissioner of Patents. 

